Renewable energy systems are of importance as being modular, nature-friendly and domestic. Among renewable energy systems, a great deal of research has been conducted especially on photovoltaic effect, wind energy and fuel cell in the recent years. In this study, a residential application of photovoltaic-wind/fuel cell hybrid energy system established at the Clean Energy House in Denizli, Turkey, has been investigated. The study is based on the distribution and consumption of Direct Current (DC) electrical energy which is produced by the hybrid system. (C) 2010 Elsevier B.V. All rights reserved.